Academic Experts Solutions for Chapter: p-Block Elements (Halogens & Noble Gases), Exercise 1: Exercise

Among noble gases (from $\mathrm{He}$ to $\mathrm{Xe}$) only xenon reacts with fluorine to form stable fluorides because xenon.

What are the products formed in the reaction of xenon hexafluoride with silicon dioxide?

Select the correct order (s).

A solution of ${\mathrm{KI}}_3$ in water contains:

A greenish yellow gas reacts with an alkali metal hydroxide to form a halate which can be used in fireworks and safety matches. The gas and halate, respectively are:

Which of the following statement (s) is/are incorrect for noble gases?

Explain the following with proper reason:
$\left(\mathrm{i}\right)$ Fluorine cannot be prepared from fluorides by chemical oxidation.
$\left(\mathrm{ii}\right)$ Anhydrous $\mathrm{HCl}$ is a bad conductor of electricity while aqueous $\mathrm{HCl}$ is a good conductor.
$\left(\mathrm{iii}\right)$ Halogens are strong oxidising agents.
$\left(\mathrm{iv}\right)$ Bleaching of flowers by chlorine is permanent while after bleaching with ${\mathrm{SO}}_2,$ the colour returns.
$\left(\mathrm{v}\right)$ Iodine dissolves more in $\mathrm{KI}$ solution than in water.
$\left(\mathrm{vi}\right)$ ${\mathrm{KHF}}_2$ is well known whereas, ${\mathrm{KHCl}}_2$ or ${\mathrm{KHBr}}_2$ does not exist.
$\left(\mathrm{vii}\right)$ Ferric iodide is very unstable but ferric chloride is stable.
$\left(\mathrm{viii}\right)$ Fluorine does not form ${\mathrm{F}}_3$- (polyhalide) ion.
$\left(\mathrm{ix}\right)$ $\mathrm{HF}$ is not stored in glass bottles but kept in wax lined bottles.
$\left(\mathrm{x}\right)$ $\mathrm{HF}$ has a greater electronegativity difference and more ionic character than $\mathrm{HCl}, \mathrm{HBr}$ and $\mathrm{HI}$ but it is the weakest acid.

What happens when? (Give balanced equations.)
$\left(\mathrm{i}\right)$ Sodium iodate is treated with sodium bisulphite solution.
$\left(\mathrm{ii}\right)$ Chlorine is passed through hot and concentrated $\mathrm{NaOH}$ solution.
$\left(\mathrm{iii}\right)$ Chlorine is passed into dilute and cold potassium hydroxide solution.
$\left(\mathrm{iv}\right)$ Chlorine gas is bubbled through a solution of ferrous bromide.
$\left(\mathrm{v}\right)$ lodine reacts with concentrated ${\mathrm{HNO}}_3.$
$\left(\mathrm{vi}\right)$ Chlorine is passed over slaked lime.
$\left(\mathrm{vii}\right)$ Potassium iodide is heated with ${\mathrm{MnO}}_2$ and concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4.$
$\left(\mathrm{viii}\right)$ Chlorine reacts with ${\mathrm{Na}}_2{\mathrm{SO}}_3$ solution.
$\left(\mathrm{ix}\right)$ lodine is added to acidified stannous chloride solution